Filter



Sept 18, 1951 w. v. KENNEDY 2,568,196

FILTER Filed Feb. 8. 194'? INVENToR. Wd// T/. Ken/leafy BY @My/JW T TORNE YS.

Patented Sept. 18, 1951 FILTER Walter V. Kennedy, Central Falls, R. I., assigner to Fram Corporation, a corporation of Rhode Island Application February 8, 1947, Serial No. 727,353

li claim. `(ci. 21o-131) This invention relates to a iilter of the type particularly adapted for use with an internal combustion engine for ltering the lubricating oil thereof while the engine is in operation, although it may have various other uses.

Filters of this general type usually comprise a case which is permanently secured to the machine or some adjacent part with the liquid to be filtered leading to and from the casing for the iiow of the liquid to be filtered. Within the casing there is' v from the casing for the Substitution of a fresh cartridge. Some means such as a bolt is usually utilized for holding this cover in position.

The removal oi the cartridge from the casing is somewhat of a messy operation where oil is ltered, in that the oil will cling to the cartridge upon removal and will drip on adjacent parts of the engine or get on the hands of the operator when the removal is made. Further, it is necessary for a wrench to be used to remove the nut which holds the cover in place and again necessary to use the wrench for tightening the bolt which holds the cover in place when the cover is replaced.

One of the objects of this invention is to provide an arrangement for the replacement of a used ltering medium without the need of use ot a wrench.

Another object of this invention is to provide a means for quickly removing one cartridge and replacing it with another cartridge.

Another object of this invention is to provide for the replacement of a lter cartridge in which there will be no need oi contact of the hands or tools or other parts with the oily surface of the cartridg whereby the hands may become dirty or soiled.

Another object of the invention is to provide an arrangement for removing a used cartridge and replacing it with a fresh cartridge in which the possibility of dripping of the liquid ltered from thecartridge removed is reduced to a minimum.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described and parhcularly pointed out in the appended claim in the accompanying drawings:

Q Fig. l is a sectional view illustrating the illter; Fig. 2 is a top plain view of the structure shown in Fig. l;

Fig. 3 is a sectional view on line 3 3 of Fig. 2;

Fig. 4 is a sectional view on substantially line -t of Fig. 2; and

Fig. 5 is a.' fragmental sectional view on line li--t of Fig. l.

In proceeding with this invention, I provide a stud or boss which is permanently mounted on 'some part' of the machine in connection with which the lter is used, and has leading to it the iniiow conduit with the discharge conduit leading therefrom. A suitable cuplike frame is secured on this bosss, which in turn has a bracket for mounting it in position. This framework serves largely the function of providing a detachable connection for a detachable member which contains the cartridge. This detachable member is in the form of a casing or shellwhich is recessed to receive the stud and is arranged to seal-therewith. The center discharge; conduit of the detachable member is arranged to seal with one' of the conduits in the stud while the other conduit is so arranged that liquid to be ltered may flow into the shell of the detachable member. A filter medium is arranged between this inow conduit and the discharge conduit for the passage' of the liquid therethrough. Some sort of quick detachable connection is provided between this shell or detachable member and the permanent member whereby by telescoping the recess and stud and then turning the entire detachable member or shell a lock is provided which holds the two parts in assembled relation.

With reference to the drawings, a cup ld is drawn from sheet stock which has a band il embracing the outer surface of the cup and is provided with outwardly extendng' portions l2 with anges llt to provide for mounting the bracket on some suitable surface support. A bolt Hl passes through the portions l2 having a head it ai; one end and'a nut it on the threaded portion il at the other end for contracting the band so as to frictionally bind and hold the cup i t.

A solid cylindrical block or stud 2d is secured .through the bottom 2l of the cup and held in this position by any suitable means such as welding as at 2t. This stud is provided with a recess 23 in which a doughnut-shaped soit packing 2d oi' some synthetic rubber-like material is provided, it having a characteristic so that it will not be adeeted by the liquid which is to be ltered. A conduit td extends through this stud 2d and is provided with an attaching recess it for a copper tube or the like. This conduit is usually used for the inflow of liquid to the illter. A conduit 21 is provided centrally of the stud and is in communication with the threaded recess 23 for the attachment of the discharge copper tube from the device. At the upper end of this discharge conduit 21 a nipple 29 is provided with a conical surface 33 for the purpose hereinafter mentioned.

A detachable member is designated generally 3| and consists of a shell 32 of metal which is rounded at its lower end as at 33 and recessed as at 34 of a size to receive the upper end ofthe stud 20. The walls of this recess when positioned over the stud will engage the soft packing 24 and provide a. uid tightseal at this location. The walls of the recess are turned inwardly as at 35 but areof a size to leavev a clear opening about the member 29 for the ilow of liquid inwardly into the shell 32 through the conduit 25.

A center tube 36 which is perforated throughout its extent is located in the shell 32 and has secured at its end 31 a flexible plate or diaphragm 38 which is located on this tube by reason of the projection 39 extending into it. A ltering medium consisting of cotton'waste 40 is located about the center tube 36 and a second end plate or diaphragm 4I having an opening to receive the tube with iianges 42 surrounding the tube is positioned over the tube and rests against the waste at the other end. A corrugated sheet of perforated cardboard 43 embraces the waste pack and extends beyond the ilexible plates 38 and 4I. This plate 38 may be iiexed downwardly by pressure of the inclined inner surface 44 of the shell 32 against the cardboard which in turn presses on the plate 33, while the plate 4I through the cardboard presses against the inwardly curved wall 33 oi' this shell. The center tube is free to be forced upwardly by reason of the spring of the plate 33 which acts as a diaphragm. The tube 36 is of a. diameter to rest against the conical surface 33" of the member 29 and if the shell is forced downwardly there is a resilient urge on this tube through the diaphragm plate 33, tending to force the tube downwardly.

In order to detachably connect the shell 32 to the cup I0, this cup has inwardly extending lips I5 at four locations about its periphery which extend inwardly a substantial distance leaving a space suilicient to permit passage of the shell 32 into the cup. The ends of these lips are raised at one end as at 46 so as to provide camming ends or an inclined guiding surface beneath these lips and are turned down at their other end as at 48' to provide a. stop. The shell32 is provided with outward projections 41 of an extent suhstantially the extent of the lips and of a length which will pass between the ends of the lips in the circumferential extent. These projections extend outwardly a distance so that in one position of rotation the shell may be passed into the cup I0 and then upon turning, these projections 41 will extend beneath the lips 45, being guided into position by the upturned ends 43 of the lips so as to lock the shell member and base member or cup in assembled relation. In forcing the shell member downwardly so as to position the projections beneath the lips, a certain spring action occurs through the plate 33 4 so as to apply a resilient pressure upon the center tube and provide a good seal for the end of the center tube on the conical surface 30.

A locking finger 48 (see Fig. 4) consisting of a resilient strip 49 welded to the lip 45 as at 3| will engage the edge of a projection 41 and prevent turning of the shell to release position until the flnger is manually lifte l by handle 52 to permit this rotation.

Liquid will flow in through the conduit 25 and surround the lter material 40 passing through the lter material then into the center tube 33 and downwardly out through the discharge conduit 2T; After the iilter element collects all the contaminant that it can hold the entire shell 3| may be removed by turning the shell so that the projections 41 move out from under the lips 43 and then this shell may be withdrawn from the cup I 0 and thrown away, while a new shell 3l may be used to replace it. Thus the parts with which the liquid to be filtered contacts are not touched by the hand nor is it necessary to utilize any wrench in the removal or replacement of the cartridge.

I claim: j

A illter comprising xed and removable members the fixed member having a projection with a cylindrical surface with an inlet conduit and a discharge conduit extending axially therethrough, a nipple at the axis of said cylindrical projection through which one of said conduits passes, the removable member having a recess to telescopingly receive said projection, an elastlcally compressible gasket to provide a liquid seal between the wall of said projection and the wall of said recess in which it is telescoped when the projection is in said recess, said removable member provided with a lter cartridge having a conduit to register with and provide a. sealing seat with said nipple when the members are assembled to separate the ow through the registering conduit from the other conduit, means communicating the other conduit of said projection through the recessed telescoping portion of said removable member, and interlocking means rigid with each of said members to detachably hold said members in assembled relation by a relative movement of said members a fraction of a revolution, said means providing a camming of said members toward each other to draw the engaging conduits into sealing relation.

WALTER V. KENNEDY.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS 

